While I like to get a high score here and there, when it comes to playing against someone, I really don't care if I win or lose, or even if I play particularly well... Although when It all comes together on that rare game, I'm very happy to have played so well.
I've never been real competitive as a person, and I think this lack of competitiveness makes me an objectively poorer player.
What about you? Do you think your sheer will to exceed or primal competitive nature makes you a better player?